Gap gauge



FIG. 1 is a top, left perspective view of a gap gauge arranged between panels of an automobile, showing my new design;

FIG. 2 is a left, side perspective view of the gap gauge of FIG. 1 removed from between the panels of an automobile;

FIG. 3 is a right, side perspective view of the gap gauge of FIG. 2 ;

FIG. 4 is a front elevational view thereof;

FIG. 5 is a rear elevational view thereof;

FIG. 6 is a left side elevational view thereof;

FIG. 7 is a right side elevational view thereof;

FIG. 8 is a top plan view thereof; and,

FIG. 9 is a bottom plan view thereof.

The broken line showing of the panels of an automobile in FIG. 1 forms no part of the claimed design. 

CLAIM The ornamental design for a gap gauge, as shown and described. 